Inositol is the fourth supplement of Dr. Huberman’s ‘sleep cocktail.’ Inositol facilitates the proper metabolism of our “feel-good” hormones, which allows for better release of certain chemicals in the brain, such as serotonin. Serotonin is a precursor to melatonin, which is why it is excellent for sleep and relaxation. Since taking inositol, Huberman has said he has noticed improved sleep. More specifically, he has seen how he can sleep better through the night. Huberman takes 900mg of Momentous Inositol before bed.